diff --git a/composer.json b/composer.json
index 60b1a39..1efa63f 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,7 @@
     "license": "MIT",
     "authors": [],
     "require": {
-        "php": ">=5.4",
+        "php": ">=5.6",
         "wp-cli/wp-cli": "^2"
     },
     "require-dev": {
diff --git a/phpcs.xml.dist b/phpcs.xml.dist
index b5316ad..589c567 100644
--- a/phpcs.xml.dist
+++ b/phpcs.xml.dist
@@ -38,7 +38,7 @@
 
 	<!-- For help understanding the `testVersion` configuration setting:
 		 https://github.com/PHPCompatibility/PHPCompatibility#sniffing-your-code-for-compatibility-with-specific-php-versions -->
-	<config name="testVersion" value="5.4-"/>
+	<config name="testVersion" value="5.6-"/>
 
 	<!-- Verify that everything in the global namespace is either namespaced or prefixed.
 		 See: https://github.com/WordPress-Coding-Standards/WordPress-Coding-Standards/wiki/Customizable-sniff-properties#naming-conventions-prefix-everything-in-the-global-namespace -->